Garbage disposal makes a loud humming noise when switched on but does not grind; after a few seconds it shuts off.

Safety first: Turn off the switch and shut off the breaker. Never attempt to free a jam with the power on.

• Use the service wrench: Insert the Maxmatic service (Allen) wrench into the bottom hex port and work the impeller plate back and forth until it rotates freely.
• Remove debris from above: From the sink opening, use pliers or tongs to remove any foreign objects. Do not put your hand inside.
• Reset overload: Press the reset button on the bottom of the unit after clearing the jam and allow a few minutes for cooling.
• Test with water only: Restore power and run the disposal with cold water only for a few seconds to confirm smooth operation before grinding food again.

If the plate cannot be freed or the unit immediately jams again, internal damage may require replacement of the disposal.